All posts by Jeremy Eades

I'm an English teacher in Japan. I have an interest in the brain and language acquisition, not to mention writing and the pipedream that I'll become the next Asimov. Or something like that. Nice to meet you!

Speeding up CO2 absorption in the ocean

The electrochemical weathering cycle

The oceans are nature’s way of removing carbon dioxide from the atmosphere – it’s estimated that one third of human-generated CO2 has been absorbed by the sea.  But with the seas becoming more acidic, the rate of CO2 absorption is reduced.  But what happens if they become more alkaline?  Some Harvard researchers predict we could increase CO2 absorption by speeding up the natural release of basic solutions into the ocean, thus reducing the rate of release of CO2 in the atmosphere, helping corals and sea life affected by more acidic seas, and giving us cake.

There are some downsides, however, including localized pollution (the alkalines would be concentrated around the production plants, thus harming local sea life), price ($100 for every ton or CO2 removed), and energy – if  the process were powered by coal, the net effect would be addition of CO2.  Renewable energy, like geothermal, is one possibility around this, and in such a case could be more beneficial (CO2-wise) than replacing an entire coal plant.

See here for the abstract, it’s worth it just to read the title.

(article & image via Environmental Science & Technology Online)

DARPA Urban Challenge

Well, by now the DARPA Urban Challenge should be underway.  As of Nov. 2nd, 24 teams had been eliminated, leaving just 11 participants to make the 6-hour, 60-mile (that’s 96km for you metric-lovers out there).  The challenges:  navigating an urban setting without running over any humans (yes, that’s a rough summary, but the rules on the DARPA site are in pdf form, which locks up my computer – thanks, Adobe!)

The ultimate goal is to have a computer system that can run a supply convoy autonomously, merging in and out of traffic and navigating intersections.  Last year, Stanford U.’s team took home the first prize.

(via DailyTech) (image from DARPA website)

Long-term energy solutions: Is nuclear our best option?

While we’re definitely big optimists here at Futurismic on alternative energies, there are downsides to most of what we consider clean energy.  Biofuels in their current incarnation pits the hunger of the poor against the hunger of our poor.  Solar is at the mercy of cloudy weather and efficiency concerns, while similar problems face wind power.  And coming from the Midwest United States, tidal power generators aren’t going to do me a lick of good.

The far-thinking people at the Long-Now Foundation had two very fascinating speakers back in September whose theory is that nuclear is the way to go.  They’re not your usual nuclear shills, either.  Gwyneth Cravens wan an anti-nuclear activist who marched against the bomb and against the Shoreham Nuclear Power Plant on Long Island.  The other is an sustainable organic-farming, bee-keeping, nuclear expert at Sandia Labs called Dr. Richard Anderson.

Their point is that alternative energies are largely tied to the whims of nature, something not good enough to supply the baseload power for our energy needs.  They do bring up some scary thoughts on our current use of fossil fuels, and make comparisons to what we would consume using nuclear.  One fun tidbit is that all the nuclear waste that would be generated to provide power for the average American over the course of their life would fit inside a Coke can.  Give it a listen if you can, but at least read the blog summary.

Personally, I think nuclear’s the way to go, at least for the moment, although I definitely think wind and solar can and should be used to provide supplemental power.  Maybe someday we can move to completely clean energy, but that day hasn’t come yet.

(image via Operators Are Standing By)

Engineering plants for fun and profit – and bettering our future

Time was, genetic engineers were putting jellyfish genes in everything to see what crazy animals they could get to glow in the dark.  Now, however, they’re doing quite a bit more.  The journal Proceedings of the National Academy of Sciences has a few articles on various uses for genetically modified plants.  Two papers discuss using trees to remove harmful chemicals from the atmosphere, the third identifies a way to modify the Chlamy (a green alga) to produce hydrogen.  It seems that algae may be the future of biofuels, after a report on using algae to produce a type of biodiesel.

(image via IRRI Images)

Solar nanowires

Building off of Tomas’ post on nanowires and the cool stuff they can do, we see a letter to Nature discussing the possibility of nanowires that can be powered by the sun, thereby requiring no external power source.  Supposedly, these nanowires would be more efficient than a crystal in creating electricity from solar energy. 

(via Ars Technica) (image from Inexpressible is possible)